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elections ave triangle numbers floors integers perimeter albgebra people maths folding tube maps dates books balancing cryptic crossnumbers consecutive numbers angles products binary combinatorics dominos proportion digital products christmas ellipses shapes triangles unit fractions integration multiples geometric mean sport star numbers squares square roots planes number irreducible numbers matrices rectangles regular shapes 3d shapes cards polynomials multiplaction squares circles clocks averages functions cryptic clues indices median differentiation sums advent mean shape colouring determinants doubling numbers palindromes crossnumbers spheres square numbers surds decahedra complex numbers prime factors chalkdust crossnumber consecutive integers geometric means digits bases factors logic parabolas multiplication grids fractions wordplay pentagons games trigonometry partitions even numbers volume sequences calculus scales area quadratics coordinates perfect numbers dice xor chocolate lists range factorials time division cube numbers rugby crosswords prime numbers graphs tangents taxicab geometry tiling powers probabilty cubics axes lines chess money expansions arrows quadrilaterals pascal's triangle digital clocks remainders hexagons sets the only crossnumber neighbours addition menace coins square grids symmetry tournaments means polygons sum to infinity odd numbers dodecagons 2d shapes gerrymandering algebra percentages speed routes geometry medians probability